... to know our JIANGSHAN brand diamond tools. 1. single tube bit and reamer:Φ28,Φ36,Φ46,Φ56,Φ59,Φ60 ... 75,Φ76,Φ91,Φ94,Φ110 etc. 2. Double tube bit and reamerΦ28,Φ36,Φ46,Φ56,Φ59,Φ60 ... bit, composite slice bit,diamond oil bit Diamond single-tube bit and reamer Nominal sizeBit Reamer Screw thread Exteral ... diamond bit are suitable to different strata1) flat-base and arc labial surface can be widely applied in ...